[bugfix] Disable multi-line description for deb packages

[dominikschulz]

goreleaser/nfpm seems to handle these incorrectly at the moment. Disabling these until that is fixed seems to help.

[zobelhelas]

The proper fix would had been to add <space>. as placeholders for an empty line.

Description: gopass password manager - full featured CLI replacement for pass, designed for teams.
 .
 gopass is a simple but powerful password manager for your terminal. It is a
 Pass implementation in Go that can be used as a drop in replacement.
 .
 Every secret lives inside of a gpg (or: age) encrypted textfile. These secrets
 can be organized into meaninful hierachies and are by default versioned using
 git.
 .
 This package contains the main gopass binary from gopass.pw. In Debian and
 Ubuntu there is an unfortunate name clash with another gopass package. That is
 completely different and not related to this package.

[dominikschulz]

@zobelhelas IIUC this should be handled by goreleaser / nfpm.

It's an encoding detail that might be different for different destination packages.